What is the preferred way of cooling voodoo2 sli 12MB cards?

Big Heatsink and Fan?

Fans on top?
- If so, how do you attach them to stay in place?

Big Heatsink?

Small Heatsinks?
- If these, which chips should get the heatsinks on them?

Preferred method of attaching the heatsinks to keep them on but not damage the chip if you need to take them off?